SOLUTION: A car undergoes a displacement of (3, -7) km in 8 minutes by driving 3 km towards the east and then turning and driving 7 km towards the south. What is the car's speed?

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Question 622754: A car undergoes a displacement of (3, -7) km in 8 minutes by driving 3 km towards the east and then turning and driving 7 km towards the south.

What is the car's speed?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A car undergoes a displacement of (3, -7) km in 8 minutes 

by driving 3 km towards the east and then turning and driving 7 km towards the south.

 D = sqrt%283%5E2+%2B+7%5E2%29+=+sqrt%2858%29

 speed = sqrt%2858%29%2F8+=+.95%28km%2Fmin%29